CVE-2026-11857

HIGHPre-NVD 8.48.4—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 81% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
8.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.4Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Quanos SCHEMA ST4 on-premises contains a local privilege escalation vulnerability in the Client Update Service due to insecure deserialization in the .NET Remoting service. The service is configured with TypeFilterLevel.Full and is bound to local interfaces only through named pipes. A local authenticated attacker can connect to the local named pipe, obtain the .NET Remoting endpoint, and send specially crafted serialized objects. Successful exploitation results in arbitrary code execution in the context of the update process with NT AUTHORITY\SYSTEM privileges. Network-only exploitation is not possible and local host access with an authenticated user session is required.

CVSS v3
8.4
EG Score
8.4(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity84% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
19%
KEV
Not listed

Published

June 17, 2026

Last Modified

June 17, 2026

Advisory Details (1)

Auto-updated Jun 18, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Multiple Vulnerabilities in Quanos Content Solutions SCHEMA ST4 - SEC Consult

https://r.sec-consult.com/quanos

Vendor Advisories for CVE-2026-11857(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 74× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 106 total refreshes for this CVE.

  1. 2026-07-26 19:27 UTCEG score recompute
  2. 2026-07-26 19:27 UTCGHSA enrichment
  3. 2026-07-26 14:54 UTCEPSS rescore
  4. 2026-07-26 14:54 UTCEPSS rescore
  5. 2026-07-25 14:17 UTCEPSS rescore
  6. 2026-07-24 14:17 UTCEPSS rescore
  7. 2026-07-23 14:18 UTCEPSS rescore
  8. 2026-07-23 03:04 UTCEG score recompute
  9. 2026-07-22 14:08 UTCEPSS rescore
  10. 2026-07-21 15:24 UTCEPSS rescore
  11. 2026-07-20 17:08 UTCEPSS rescore
  12. 2026-07-19 14:30 UTCEPSS rescore
  13. 2026-07-19 02:28 UTCEPSS rescore
  14. 2026-07-18 10:04 UTCEPSS rescore
  15. 2026-07-16 21:53 UTCGHSA enrichment
  16. 2026-07-16 17:02 UTCEPSS rescore
  17. 2026-07-16 02:51 UTCGHSA enrichment
  18. 2026-07-15 16:57 UTCEPSS rescore
  19. 2026-07-15 14:53 UTCGHSA enrichment
  20. 2026-07-15 02:53 UTCGHSA enrichment
  21. 2026-07-15 02:00 UTCEPSS rescore
  22. 2026-07-14 14:44 UTCGHSA enrichment
  23. 2026-07-14 02:44 UTCGHSA enrichment
  24. 2026-07-13 22:30 UTCEPSS rescore
  25. 2026-07-13 14:46 UTCGHSA enrichment
Show 75 more
  1. 2026-07-13 06:12 UTCEPSS rescore
  2. 2026-07-13 02:47 UTCGHSA enrichment
  3. 2026-07-12 14:48 UTCGHSA enrichment
  4. 2026-07-12 05:46 UTCEPSS rescore
  5. 2026-07-12 02:50 UTCGHSA enrichment
  6. 2026-07-11 14:51 UTCGHSA enrichment
  7. 2026-07-11 08:27 UTCEPSS rescore
  8. 2026-07-11 02:53 UTCGHSA enrichment
  9. 2026-07-10 14:55 UTCGHSA enrichment
  10. 2026-07-10 01:46 UTCGHSA enrichment
  11. 2026-07-09 19:10 UTCEPSS rescore
  12. 2026-07-09 13:13 UTCGHSA enrichment
  13. 2026-07-09 01:15 UTCGHSA enrichment
  14. 2026-07-08 13:15 UTCGHSA enrichment
  15. 2026-07-08 00:43 UTCGHSA enrichment
  16. 2026-07-07 13:46 UTCEPSS rescore
  17. 2026-07-07 12:45 UTCGHSA enrichment
  18. 2026-07-07 00:47 UTCGHSA enrichment
  19. 2026-07-06 16:27 UTCEPSS rescore
  20. 2026-07-06 12:48 UTCGHSA enrichment
  21. 2026-07-06 02:23 UTCEPSS rescore
  22. 2026-07-05 20:07 UTCGHSA enrichment
  23. 2026-07-05 08:08 UTCGHSA enrichment
  24. 2026-07-05 02:30 UTCEPSS rescore
  25. 2026-07-05 02:30 UTCEPSS rescore
  26. 2026-07-04 17:43 UTCGHSA enrichment
  27. 2026-07-04 06:31 UTCEPSS rescore
  28. 2026-07-04 05:37 UTCGHSA enrichment
  29. 2026-07-03 16:06 UTCGHSA enrichment
  30. 2026-07-03 04:08 UTCGHSA enrichment
  31. 2026-07-02 16:07 UTCGHSA enrichment
  32. 2026-07-02 04:09 UTCGHSA enrichment
  33. 2026-07-01 16:10 UTCGHSA enrichment
  34. 2026-07-01 15:06 UTCEPSS rescore
  35. 2026-07-01 15:06 UTCEPSS rescore
  36. 2026-07-01 04:12 UTCGHSA enrichment
  37. 2026-06-30 23:22 UTCEPSS rescore
  38. 2026-06-30 16:15 UTCGHSA enrichment
  39. 2026-06-30 04:15 UTCGHSA enrichment
  40. 2026-06-29 16:16 UTCGHSA enrichment
  41. 2026-06-29 14:06 UTCEPSS rescore
  42. 2026-06-29 04:15 UTCGHSA enrichment
  43. 2026-06-28 16:10 UTCGHSA enrichment
  44. 2026-06-28 14:07 UTCEPSS rescore
  45. 2026-06-28 04:56 UTCEPSS rescore
  46. 2026-06-28 04:56 UTCEPSS rescore
  47. 2026-06-28 04:12 UTCGHSA enrichment
  48. 2026-06-27 16:12 UTCGHSA enrichment
  49. 2026-06-27 04:13 UTCGHSA enrichment
  50. 2026-06-27 03:08 UTCEPSS rescore
  51. 2026-06-26 16:15 UTCGHSA enrichment
  52. 2026-06-26 04:17 UTCGHSA enrichment
  53. 2026-06-25 16:18 UTCGHSA enrichment
  54. 2026-06-25 13:49 UTCEPSS rescore
  55. 2026-06-25 04:19 UTCGHSA enrichment
  56. 2026-06-24 16:16 UTCGHSA enrichment
  57. 2026-06-24 14:05 UTCEPSS rescore
  58. 2026-06-24 04:17 UTCGHSA enrichment
  59. 2026-06-23 21:32 UTCEPSS rescore
  60. 2026-06-23 15:59 UTCGHSA enrichment
  61. 2026-06-23 04:00 UTCGHSA enrichment
  62. 2026-06-22 15:59 UTCGHSA enrichment
  63. 2026-06-22 14:25 UTCEPSS rescore
  64. 2026-06-22 14:25 UTCEPSS rescore
  65. 2026-06-22 04:00 UTCGHSA enrichment
  66. 2026-06-21 16:02 UTCGHSA enrichment
  67. 2026-06-21 14:56 UTCEPSS rescore
  68. 2026-06-21 14:56 UTCEPSS rescore
  69. 2026-06-21 03:53 UTCGHSA enrichment
  70. 2026-06-21 01:59 UTCEPSS rescore
  71. 2026-06-21 01:59 UTCEPSS rescore
  72. 2026-06-20 15:51 UTCGHSA enrichment
  73. 2026-06-20 03:53 UTCGHSA enrichment
  74. 2026-06-19 19:25 UTCEPSS rescore
  75. 2026-06-19 15:53 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-11857?
CVE-2026-11857 is a high vulnerability published on June 17, 2026. Quanos SCHEMA ST4 on-premises contains a local privilege escalation vulnerability in the Client Update Service due to insecure deserialization in the .NET Remoting service. The service is configured with TypeFilterLevel.Full and is bound to local interfaces only through named pipes. A local…
When was CVE-2026-11857 disclosed?
CVE-2026-11857 was first published in the National Vulnerability Database on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-11857 actively exploited?
CVE-2026-11857 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 80.6% of all scored CVEs.
What is the CVSS score of CVE-2026-11857?
CVE-2026-11857 has a CVSS v3 base score of 8.4 (NVD).
How do I remediate CVE-2026-11857?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-11857, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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